/Engine/Source/Editor/UnrealEd/Public/Kismet2/KismetReinstanceUtilities.h
Attempts to copy as many properties as possible from the old object to the new. Use during BP compilation to copy properties from the old CDO to the new one.
static void CopyPropertiesForUnrelatedObjects ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * OldObject, [UObject](API\Runtime\CoreUObject\UObject\UObject) * NewObject, bool bClearExternalReferences, bool bForceDeltaSerialization )